Abstract

Mineral nutrient requirements of Cannabis sativa ‘cherry wine’ (hemp) were studied under steady-state nutrition where nutrients and water (H₂O) removed via transpiration uptake were replenished daily. Nitrate (NO₃⁻), potassium (K⁺), and H₂O uptake for hemp are presented for 24 h periods over the course of vegetative growth. This can estimate the changes in potential NO₃⁻ and K⁺ uptake rate in accordance with demand. Daily nutrient uptake and transpiration rates are discussed relative to the plant's H₂O uptake and relative growth rate. Non-limiting conditions were achieved at base nutrient recipe NO₃⁻ and K⁺ concentrations of 201 and 290 ppm. Biomass accumulation and stem caliper increment increase over the vegetative growth cycle were found to have a positive linear correlation with NO₃⁻, K⁺, and H₂O uptake. Consequently, NO₃⁻ and K⁺ concentrations in the irrigation solution can be steadily increased throughout the hemp vegetative cycle in relation to the driving relative variables growth and transpiration rate. In so doing, a time dimension is introduced concerning the nutrient amount supplied relative to plant biomass accumulation and nutrient uptake via the transpiration stream. Overall, lower amounts of NO₃⁻ and K⁺ were needed to optimize plant growth than previously thought by industry professionals.

摘要

在稳态营养条件下研究了大麻“樱桃酒”（大麻）的矿物质养分需求，其中每天补充通过蒸腾作用去除的养分和水（H ₂ O）。硝酸盐（NO ₃ ^- ），钾（K ⁺），和H ₂ ö摄取大麻呈现24周小时期间超过营养生长的过程。这可估计的变化潜在NO ₃ ^-和K ⁺按照需求吸收速率。讨论了相对于植物H ₂ O吸收和相对生长速率的每日养分吸收和蒸腾速率。在基本营养配方NO时达到了非限制性条件₃ ^-和K ⁺浓度201和290 ppm的的。生物量积累和茎卡钳在营养生长周期增量增加被发现具有与NO呈正相关关系₃ ^-，K ⁺和H ₂ ö摄取。因此，NO ₃ ^-和K ⁺中的冲洗溶液的浓度可以稳定地在整个麻生长周期相对于增加至驱动相关变量的生长和蒸腾速率。在此，引入时间维度，该时间维度涉及相对于植物生物质积累和通过蒸腾流吸收的养分而供应的养分量。总体而言，NO ₃含量较低^-和K ⁺是优化植物生长所需要的，这超出了行业专业人员以前的想象。